A practical work-shop companion for tin, sheet-iron, and copper-plate workers ... with numerous valuable receipts and manipulations for every-day use in the work-shop (1904)
Blinn, Leroy J. [from old catalog] · Philadelphia, H. C. Baird & co. · leaf 62
sed in the elevations of the arches. It now only remains to develop the surfaces of these HIPPED ROOF. 39 arches; that is, to find the shape of tin, zinc or lead whichwould cover the roof of a building, when formed as heredescribed. The student is advised to work this study on a largescale on… … Fg 49 mencing at A, set off on it the distances into which the curveAC (Fig. 48) is divided—(measuring on the curve, not onthe springing line)—namely, the distances A, ab c, etc.At the points on the straight line thus marked, draw
Metal-work
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